@charset "UTF-8";
/* 这种注释在css里会保留，因为原生的css里就会有这种注释 */
.hi {
  background-color: lightpink;
}

.demo {
  width: 100px;
  height: 100px;
  background-color: #ccc;
}

.demo:hover {
  background-color: #ccc;
}

.circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: lightblue;
  text-align: center;
  line-height: 100px;
  color: #fff;
}
